It said 10-20cm of snow could fall in northern Scotland, Northern Ireland, north-west Midlands and north Wales.

The Met Office has yellow "be aware" warnings in place for snow and ice.

It said across the UK, 2-5 cm (1-2 inches) of snow was likely in the other affected areas.

"The heaviest and most frequent snow showers will progressively become confined to north-east Scotland during Saturday," it said.

Storm Caroline's high winds hit Scotland

Engineers work to repair Storm Caroline damage

Snow and ice preparations under way in Wales

Storm to bring gales, snow and ice in Northern Ireland

It comes after Storm Caroline brought winds gusting more than 90mph on Thursday, disrupting rail and ferry travel and shutting dozens of schools in Scotland.

About 500 homes remain without power in Scotland as repair teams were stood down for safety reasons overnight.

BBC weather presenter Louise Lear said although the storm-force winds were expected to ease during the nigh t, conditions will remain blustery and there will be a cold start to Friday with temperatures ranging from -2C to 3C (28F-38F).

Pictures of the snow showers have been shared overnight on social media.

Skip Twitter post by @BBCScotWeather

After today's stormy weather, our attention now turns to snow and ice. Here's some snowy scenes from our @BBCWthrWatchers this evening. Chris pic.twitter.com/imJ4fuUUla

â" BBC Scotland Weather (@BBCScotWeather) December 7, 2017

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Skip Twitter post by @barrabest

Oldpark Road in north Belfast a short time ago. Snow thick enough on the pavement that you start to walk like a penguin so that you donât fall. #Sneacta #IrlSnow. pic.twitter.com/E1QTofDflv

â" Barra Best ( @barrabest) December 7, 2017

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Skip Twitter post by @Derbyshirecc

This was the main Chesterfield-Manchester A623 route at Tideswell a few minutes ago. Passable with care, but avoid travel if you can. Three roads are CLOSED: A57 Snake Pass, A537 Cat & Fiddle, and A53 Leak Road. We're currently ploughing but snow still falling, pic.twitter.com/Os4a1tOQRn

â" Derbyshire CC (@Derbyshirecc) December 8, 2017

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Skip Twitter post by @CMPG

Only the lightest hint of snow at CMPG HQ in #Birmingham as our #CMPGspecials book off, however the temperature is set to drop further and more snow is forecast. Remember - NEVE R leave your car unattended whilst you defrost it! SC pic.twitter.com/MBtyNRuv9l

â" CMPG (@CMPG) December 8, 2017

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End of Twitter post by @CMPG

The Met Office said: "Icy surfaces are also likely to be an additional hazard, especially overnight and there is the possibility of travel delays on roads stranding some vehicles, while some rural communities could be cut off and power supplies interrupted."

It warned of "possible delays and cancellations to rail and air travel".

The Met Office says Storm Caroline's winds are now confined to the far north-east of mainland Scotland and the Northern Isles, and there could be gusts of 70-80 mph at times, especially over Shetland, on Friday.